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#include "cache.h"
#include "run-command.h"
#include "exec_cmd.h"
int start_command(struct child_process *cmd)
{
cmd->pid = fork();
if (cmd->pid < 0)
return -ERR_RUN_COMMAND_FORK;
if (!cmd->pid) {
if (cmd->no_stdin) {
int fd = open("/dev/null", O_RDWR);
dup2(fd, 0);
close(fd);
}
if (cmd->stdout_to_stderr)
dup2(2, 1);
if (cmd->git_cmd) {
execv_git_cmd(cmd->argv);
} else {
execvp(cmd->argv[0], (char *const*) cmd->argv);
}
die("exec %s failed.", cmd->argv[0]);
}
return 0;
}
int finish_command(struct child_process *cmd)
{
for (;;) {
int status, code;
pid_t waiting = waitpid(cmd->pid, &status, 0);
if (waiting < 0) {
if (errno == EINTR)
continue;
error("waitpid failed (%s)", strerror(errno));
return -ERR_RUN_COMMAND_WAITPID;
}
if (waiting != cmd->pid)
return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
if (WIFSIGNALED(status))
return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
if (!WIFEXITED(status))
return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
code = WEXITSTATUS(status);
if (code)
return -code;
return 0;
}
}
int run_command(struct child_process *cmd)
{
int code = start_command(cmd);
if (code)
return code;
return finish_command(cmd);
}
int run_command_v_opt(const char **argv, int opt)
{
struct child_process cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.argv = argv;
cmd.no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
cmd.git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
cmd.stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
return run_command(&cmd);
}
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